Proton transport and microstructure properties in superlattice thin films fabricated by pulsed laser deposition

Naoaki Kuwata, Noriko Sata, Takao Tsurui, Hiroo Yugami

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Superlattice thin films of the perovskite-type oxide proton conductor SrZr0.95Y0.05O3/SrTiO3 was fabricated by pulsed laser deposition. Their structural and proton transport properties were reported. X-ray diffraction analysis and selected area electron diffraction revealed that the thin films were epitaxially grown on MgO(001) substrate. High-density edge dislocations and a columnar structure were observed in the films by high-resolution electron microscopy. The in-plane electrical conductivity of the thin films was determined by impedance spectroscopy. The contribution of proton transport to the total conductivity of the films was confirmed by H2O/D2O exchange measurement. The conductivity of superlattice films was increased by introducing heterointerfaces. The high activation energy (Ea = 1.0 eV) was explained by the grain-boundary effect of the columnar structure in the films.

Original languageEnglish
Pages (from-to)8613-8618
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume44
Issue number12
DOIs
Publication statusPublished - 2005 Dec 8

Keywords

  • Defect chemistry
  • Ionic conductivity
  • Perovskite-type proton conductor
  • Superlattice
  • TEM
  • Thin film

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Proton transport and microstructure properties in superlattice thin films fabricated by pulsed laser deposition'. Together they form a unique fingerprint.

  • Cite this